Last Judgment (1985)

Cabin 3033 (1986)

The Mystery Lady (1986)

Last Seen in London (1987)

Murder in Writing (1988)

The Whitelands Affair (1989)

The Case of the Paranoid Patient (1991)

The Case of the Ludicrous Letters (1994)

The Case of the Anxious Aunt (1996)

The Darkened Room (1968)

A Mind To Murder (1971)

The End of a Shadow (1972)

Plot, Counter-Plot (1974)

My Search for Ruth (1975)

Legacy of Evil (1976)

The Deathless and the Dead (1976)
APA: This Downhill Path (1977)

The Lady in Black (1977)

Letter from the Dead (1977)

One of Us Must Die (1977)

The Poisoned Web (1979)

Poison Parsley (1979)

Last Voyage (1980)

Game, Set and Danger (1981)

Desire To Kill (1982)

We the Bereaved (1982)

Soon She Must Die (1983)